Dismountable column applicable to automatic record players

ABSTRACT

A dismountable column within a hollow shaft attachable to the base of a record player wherein the column has on the portion entering the shaft a pyramid-shaped protuberance. The tubular shaft has a vertical groove therein within which is guided the protuberance and a ring-shaped groove positioned above the protuberance when the column is fully inserted within the tubular shaft. The ring-shaped groove carries an open elastic ring having an interior tongue which rides within the vertical groove and has a length not exceeding the thickness of the wall of the tubular shaft.

United States Patent Vega Feb. 4, 1975 DISMOUNTABLE COLUMN APPLICABLE TOAUTOMATIC RECORD PLAYERS [76] Inventor: Raul Antonio Vega, Vieytes 1386,

Martinez-Pcia., Buenos Aires, Argentina [22] Filed: Jan. 29, 1974 [21]Appl. No.: 437,625

[30] Foreign Application Priority Data Feb. 9, 1973 Argentina 246523[52] US Cl. 274/10 S [51] Int. Cl ..Gllb 17/04,Gl1b 17/16 [58] Field ofSearch 274/10 S [56] References Cited UNITED STATES PATENTS 3,588,1206/1971 Bayha 274/10 S Primary ExaminerSamuel B. Rothberg AssistantExaminer-Steven L. Stephan Attorney, Agent, or Firm-Stevens, Davis,Miller & Mosher [57] ABSTRACT A dismountable column within a hollowshaft attachable to the base of a record player wherein the column hason the portion entering the shaft a pyramid-shaped protuberance. Thetubular shaft has a vertical groove therein within which is guided theprotuberance and a ring-shaped groove positioned above the protuberancewhen the column is fully inserted within the tubular shaft. Thering-shaped groove carries an open elastic ring having an interiortongue which rides within the vertical groove and has a length notexceeding the thickness of the wall of the tubular shaft.

1 Claim, 3 Drawing Figures PATENTEU H975 3.863834 SHEET 101' 2 PATENTED3,863,934

SHEET 2 0F 2 DISMOUNTABLE COLUMN APPLICABLE TO AUTOMATIC RECORD PLAYERSThis invention relates to a dismountable column for automatic recordplayers.

Columns carried by automatic record players are located in the center ofthe turn table and support a pile of records which obey a centralmechanism installed in the column acting in combination with anautomatic device located under the tray and fall one after another atthe time the pick-up moves radially outwardly. Precisely, because thecolumn has a capacity for six or eight records in its upper part thecolumn must be of a relatively long length.

However, such a column can not be fixed, because it is too long to becontained in a box, because it is undesirable if the owner wants toselectively choose the records, because the records are wasted orbecause the records are of great value. Consequently, for these reasons,when it is not desired to have the records handled by the automaticdevice, the column is taken off and substituted by another one of lesserlength.

Such a substitution must be effected inthe most practical way possible,inasmuch as certain persons, especially women and children are generallynot inclined to perform any complicated handling.

Consequently, it is necessary that the taking off and the mountingprocedures be consistent with the requirements of the delicate mechanismconcerned, that is offer a firm and precise resistance and keep in viewthe weight which the column might accumulate in its upper extremity.

On the other hand, it is necessary that when the column is mounted inits respective place, that it be in its correct position, so that itsmechanism combines with the part of the automatic arrangement, locatedin the base, otherwise it either does not work, or some of its componentparts are damaged.

The purpose of the present invention is to furnish a centraldismountable column and mounting, in an automatic record player, withoutcomplicated mechanism, which would offer security and the requiredefficiency. This purpose is reached in an absolutely efficient way, bymeans of a simple procedure consisting of an axial effort of separatingthe said column and pushing it in order to mount the same. This takesplace because of the existence ofa protuberance in the column,coinciding with a groove made in the flange ofa central hollow shaft,around which turns the plate of the record player.

For the purpose of the better understanding the invention, a set ofexplanatory drawings is hereby attached. The drawings show thepreferential way of execution, which, however, in no case, should beconsidered as a limitative one regarding the real achievement of theinvention and in which:

FIG. 1 is a perspective exposed view ofthe main elements composing thepresent invention;

FIG. 2 is an enlarged perspective view of the parts composing thecoupling; and

FIG. 3 is a longitudinal view in partial diametric section at thecoupling when assembled.

In FIG. 1 are shown column 1 the constitution and the mechanism of whichis of general knowledge, hollow central shaft 2 and retention ring 3.

Referring to both FIG. 1 and FIG. 2, column 1 has a pyramid-shapedprotuberance 4, while hollow shaft 2 has a ring-shaped groove 5 and avertical groove 6, exceeding in length the height of groove 5. Groove 6is deep enough to communicate with the hollow portion of the shaft andto give access to pyramid-shaped protuberance 4, without any free spaceor adjustment.

Ring 3 has an internal small tongue 7, which is in front of a cut 8interrupting its continuity. Ring 3 has a certain elasticity, permittingit to expand diametrically.

FIG. 3 shows a longitudinal view of all of the composing parts in theirplaces after the column has been assembled. In this position, the lowerportion of column I can be seen within the cylindrical hollow of shaft 2with the pyramid-shaped protuberance 4 centered into vertical groove 6,and resting on stop 6' to determine the limit in depth of column 1.Elastic ring 3 is positioned in ring-shaped groove 5 yielding thenecessary stop to the column.

Tongue 7 penetrates up to the interior perimeter of the cylindricalhollowness of shaft 2 thereby positioning the pyramid-shapedprotuberance 4.

Ring 3, located in the ring-shaped groove 5, is in contact therewith insuch a way that tongue 7 enters vertical groove 6. Column 1 is assembledwith shaft 2 by introducing column 1 into the cylindrical hollowness ofshaft 2 in such a way that pyramid-shaped protuberance 4 enters intovertical groove 6, which while being displaced axially will contactsmall tongue 7. Due to the elastic nature of ring 3 a slight push oncolumn 1 forces protuberance 4 past tongue 7 and against bottom 6' ofvertical groove 6.

With the sealing of protuberance 4 a certain impediment of taking off ofrecords already used, will not creep to the column.

What is claimed is:

l. A dismountable column within a hollow shaft attachable to the base ofa record player, said column having on a portion entering said shaft andon said portion a pyramid-shaped protuberance, said hollow shaft havinga vertical groove within which is guided said protuberance and aring-shaped groove positioned above said protuberance when the column isinserted fully within the shaft, and an elastic ring having an opening,the thickness of said ring being coincident with the width of thering-shaped groove and having an interior coincident with the bottom ofthe ring-shaped groove when riding within said groove, said ring havinga small interior tongue positioned opposite the opening to fit withinthe vertical groove and having a length not exceeding the thickness ofthe wall of the tubular shaft but of a length sufficient to engage saidprotuberance as said column is mounted or dismounted.

1. A dismountable column within a hollow shaft attachable to the base ofa record player, said column having on a portion entering said shaft andon said portion a pyramid-shaped protuberance, said hollow shaft havinga vertical groove within which is guided said protuberance and aring-shaped groove positioned above said protuberance when the column isinserted fully within the shaft, and an elastic ring having an opening,the thickness of said ring being coincident with the width of thering-shaped groove and having an interior coincident with the bottom ofthe ring-shaped groove when riding within said groove, said ring havinga small interior tongue positioned opposite the opening to fit withinthe vertical groove and having a length not exceeding the thickness ofthe wall of the tubular shaft but of a length sufficient to engage saidprotuberance as said column is mounted or dismounted.